Powers/Abilities: Genetically engineered with shark
DNA, the Atlantean hybrid warrior Mako has enhanced strength (Class 10,
possibly higher), increased stamina, endurance and agility. Her teeth
resemble that of a great white, with rows of razor sharp pointy teeth
she could use to rend her victims apart. During her infancy, Mako's skin
was blue like most Atlanteans. As she matured however, her skin turned
gray even as her body became more shark like. Bestial and prone to bouts
of bloodlust, Mako was nevertheless a capable, fierce warrior who had no
trouble taking on over a dozen opponents at once.

History:
(Marvel: The Lost Generation I#3 (fb) - BTS) - In the
spring of 1961, Namor the Sub-Mariner had been missing for years. Worried about the safety of Atlantis, the realm's temporary ruler Byrrah ordered warlord Krang to look into ways to defend the kingdom.
Krang sought out the controversial geneticist Vyrra who promised to
deliver the ultimate warrior to him. Combining Atlantean DNA with that
of a shark, Vyrra created an Atlantean hybrid girl who he decided to
name Mako.

(Marvel: The Lost Generation I#3 (fb)) - At some
undisclosed point in time (see
comments), Mako emerged from the tube that birthed her and
began her duties as warrior of Atlantis in the service of Vyrra and
Byrrah. However, her savage nature led to a confrontation with the First
Line that ended with Mako going to jail.

(Marvel: The Lost Generation I#12 (fb) - BTS) - Due to the imminent Skrull invasion, the First Line needed every able-bodied
super-being to pitch in. In light of this, Templar arranged to have their
former foe Mako released from prison. Somewhat more reasonable than
during their initial encounter, Mako agreed to help out and joined the
First Line as they traveled into space to confront the Skrulls aboard
their own ships.

(Marvel: The Lost Generation I#12) - During the battle,
Mako rejoiced at once again being able to cut loose. When her claws
proved durable enough to cut straight through Skrullian combat armor,
she was about to lose herself to bloodlust, praising Thakorr for just
how good it felt to rip and tear once again. Her frenzy was briefly
halted by a seriously injured Templar who, supported by his son Squire,
tried to persuade Mako that killing was not the way. Mako shot back that
maybe it wasn't his way, but it most certainly was hers, after all she
was bred to kill. Templar tried one final time to appeal to her senses,
but was shot in the head by a Skrull. Moments later, Squire died
avenging his father. Seeing these "pink-skins," as Mako called humans,
perish made her furious and she continued to cut a bloody swath through
the Skrull forces. In the end, the Skrulls dealt with her by
decompressing the sector of the ship she was in, causing Mako and the
others to be sucked out into space. There, presumably, she perished.

It's hard to pinpoint just when Mako became active. In the
Spring of 1961, she was little more than a baby, and Vyrra stressed that
it would take time for him to grow the requested warrior. Assuming he
somehow increased the rate at which she matured, Mako had to have been
on the scene by the early 70s, considering she met and (presumably)
fought Templar, a hero who retired from active duty after his marriage
in 1973. If Mako wound up in prison at that point, this would mean she
spent well over 15 years behind bars before Templar arranged for her to
be freed during the Skrull threat. That seems a little long, so let's
say she was only jailed in the mid 1980s when Templar started fighting
crime again, along with his son Squire. However, from comments she made,
it's obvious Mako came straight from prison to aid the First Line.